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How to make this login thingie working?

Posted on 2008-10-29
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Last Modified: 2010-08-05
Hi Folks!

I have an editbox which I want to use as password box.

1. when the text = 'Geef wachtwoord in'  It should be cleared when the user clicks in it
2. It should show * instead of the password characters
3. When the user clicks somewhere else ie changed his mind and does soemthing else, it should show 'Geef wachtwoord in'
4. It should validate the input, password will be 1234 thus 4 numbers

If you need more info (or more points :)) please ask,

Regards,

Peter

0
Comment
Question by:PeterdeB
  • 3
  • 3
6 Comments
 
LVL 28

Accepted Solution

by:
ciuly earned 500 total points
ID: 22831045
try this, let me know how it works
unit Unit1;
 

interface
 

uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs, StdCtrls;
 

type

  TForm1 = class(TForm)

    Edit1: TEdit;

    Button1: TButton;

    procedure Edit1Enter(Sender: TObject);

    procedure Edit1KeyPress(Sender: TObject; var Key: Char);

    procedure Edit1Exit(Sender: TObject);

  private

    { Private declarations }

  public

    { Public declarations }

  end;
 

var

  Form1: TForm1;
 

implementation
 

{$R *.dfm}
 

procedure TForm1.Edit1Enter(Sender: TObject);

begin

  with (sender as TEdit) do

  begin

    text:='';

    passwordchar:='*';

  end;

end;
 

procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);

begin

  if not (key in ['0'..'9']) then

    key:=#0

  else

    if length((sender as TEdit).Text)=4 then

      key:=#0;

end;
 

procedure TForm1.Edit1Exit(Sender: TObject);

begin

  with (sender as TEdit) do

    if length(text)<>4 then

    begin

      text:='Geef wachtwoord in';

      passwordchar:=#0;

    end;

end;
 

end.
 
 

----------dfm

object Form1: TForm1

  Left = 192

  Top = 114

  Width = 870

  Height = 640

  ActiveControl = Button1

  Caption = 'Form1'

  Color = clBtnFace

  Font.Charset = DEFAULT_CHARSET

  Font.Color = clWindowText

  Font.Height = -11

  Font.Name = 'MS Sans Serif'

  Font.Style = []

  OldCreateOrder = False

  PixelsPerInch = 96

  TextHeight = 13

  object Edit1: TEdit

    Left = 120

    Top = 80

    Width = 121

    Height = 21

    TabOrder = 0

    Text = 'Geef wachtwoord in'

    OnEnter = Edit1Enter

    OnExit = Edit1Exit

    OnKeyPress = Edit1KeyPress

  end

  object Button1: TButton

    Left = 88

    Top = 152

    Width = 75

    Height = 25

    Caption = 'Button1'

    TabOrder = 1

  end

end

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Author Comment

by:PeterdeB
ID: 22834549
Hi Ciuly,

It doesnt work, I cannot type into the edit box

Regards,

Peter
0
 
LVL 28

Expert Comment

by:ciuly
ID: 22835223
you said the password is all numbers. "4. It should validate the input, password will be 1234 thus 4 numbers"

are you typing that?
0
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Author Comment

by:PeterdeB
ID: 22836622
Hi ciuly,

I apologize, I was wrong it does work thanks! Validating the input by means of the button click, involves no rocket science right?

Regards,

Peter
0
 

Author Comment

by:PeterdeB
ID: 22836898
Got it already thanks Ciuly!

Peter
0
 
LVL 28

Expert Comment

by:ciuly
ID: 22838960
>> Validating the input by means of the button click, involves no rocket science right?

right :)
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